To amend title 49, United States Code, to clarify certain Buy America provisions.

Revises Buy America requirements applicable to Federal mass transportation assistance to define "manufactured goods" to mean each individual item specified in each line item of a procurement.

Requires the Secretary of Transportation to publish a detailed written justification in the Federal Register when issuing a waiver from Buy America provisions as to why the waiver is in the public interest. Authorizes the Secretary to grant a waiver from Buy America provisions for a microprocessor, but not for microcomputer equipment.

Allows any party adversely affected by an agency action related to Buy America provisions to seek administrative review under the Administrative Procedure Act.